From c934bb67717c04a4069182423ad1b200ac40c381 Mon Sep 17 00:00:00 2001
From: Bernardo Meurer <bernardo@meurer.org>
Date: Fri, 13 Aug 2021 15:16:21 -0700
Subject: [PATCH] nixos/hqplayerd: don't add config to restartTriggers when it
 doesn't exist

Previously when the use didn't set `hqplayer.config`, we would still
attempt to reference the config file in the restartTriggers, causing an
error.
---
 nixos/modules/services/audio/hqplayerd.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nixos/modules/services/audio/hqplayerd.nix b/nixos/modules/services/audio/hqplayerd.nix
index ed8de390417..d549ac77e0e 100644
--- a/nixos/modules/services/audio/hqplayerd.nix
+++ b/nixos/modules/services/audio/hqplayerd.nix
@@ -110,7 +110,7 @@ in
 
         unitConfig.ConditionPathExists = [ configDir stateDir ];
 
-        restartTriggers = [ config.environment.etc."hqplayer/hqplayerd.xml".source ];
+        restartTriggers = optionals (cfg.config != null) [ config.environment.etc."hqplayer/hqplayerd.xml".source ];
 
         preStart = ''
           cp -r "${pkg}/var/lib/hqplayer/web" "${stateDir}"